Athens explosion kills six including four Americans, British-Greek couple

An explosion leveled a building in Athens' Plaka district near the Acropolis on Friday, killing six people: four Americans and a British man and his Greek wife. The four Americans, believed to be two couples staying in the two-story building, had been expected to catch a 3 p.m. flight home but never showed up. Greek authorities said an initial investigation indicates a gas leak caused the blast. Three others were injured.